I hear Mr Brown lives here,but I'm not sure( )

I hear Mr Brown lives here,but I'm not sure( ) i hear tom lives here ,but i'm not sure （which room he lives i hear tom lives here,but i'm not sure_. --Is Mr Brown driving here?---I'm not sure.He___come by trai I hear Tom lives here,but I'm not sure____.A.which room he l --Is Mr.Brown driving here?--I am not sure.He ____ come by a -- I hear Tom is coming to China.--- Yes,but I'm not sure if -Is Mr Smith driving here?-I'm not sure.He _____ they__come,but i'm not sure -ls Mr.Brown driving here?-l'm not sure.He ______come by tra I'm not sure I'm not sure ( ).